JP2583388Y2 - Bladder surface release agent application device - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bladder surface release agent coating apparatus.

[0002]

2. Description of the Related Art Tires for passenger cars and the like are formed through a process of setting an unvulcanized green tire in a mold and vulcanizing the same. In the vulcanization process, a bladder is disposed in the green tire. Then, the outer surface of the bladder is pressed against the inner surface of the raw tire.

[0003] Therefore, it is necessary to easily release the outer surface of the bladder and the inner surface of the green tire when the bladder shrinks after vulcanization. Therefore, a release agent has been developed to enhance the release property.

[0004]

The above-mentioned release agent is used by being applied to the surface of a bladder. However, since there is flammability and the curing speed is high, there has been no release agent application apparatus suitable for this purpose. .

Accordingly, the present invention solves such a conventional problem and provides a release agent which is flammable and has a high curing speed.
An object of the present invention is to provide a bladder surface release agent coating device capable of uniformly and thinly coating a bladder surface.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a vertical stand having a bowl-shaped receiving portion which is open at the upper end at the upper end and rotatable around a vertical axis. An air motor that rotates and drives the rotation speed and rotation direction to be variable, and a pot-shaped bladder having an inward projection protruding inward at the center portion, the receiving portion,
A pot-shaped bladder rotation holding device that is rotatably held integrally with the inner convex portion inserted therein;
A release agent is sprayed on the surface of the pot-shaped bladder held by the device
And a spraying device .

Further, a pair of support arms, each of which has a distal end pivotally connected around a horizontal axis, are provided at each of the two distal ends, and are opened by the upward swing of the support arms to open the bladder. A claw that bites into the concave outer surface of the protrusion,
Transport means provided with a bladder suspension hook consisting of:

A pair of horizontal rollers provided in a parallel cantilever shape and rotatable about a horizontal axis, and air for rotating the pair of horizontal rollers in the same direction with variable rotation speed and rotation direction. And an annular bladder having a U-shaped cross section having thick clamp portions at both open end edges is held by a pair of the horizontal rollers such that the clamp portions are brought into contact with each other so as to be frictionally transmitted. An annular bladder rotation holding device ; held by the annular bladder rotation holding device
A spray device for spraying a release agent onto the surface of the annular bladder .

[0009]

The bladder surface release agent coating device according to the first aspect is suitable for applying a release agent to the surface of a pot-shaped bladder having an inner convex portion, and the inner convex portion is formed on a receiving portion of the vertical stand. Just holding in the insertion form completes the setting of the pot-shaped bladder, and the pot-shaped bladder can be rotated through the vertical stand.

Since the release agent is flammable and has a high curing speed , the release agent is blown onto the surface of the bladder by a spraying device while the bladder is rotated at a high speed by an explosion-proof air motor.
Put, the releasing agent is coated on the surface. This gives 1
Since the amount of release agent attached per rotation is reduced, and the bladder is kept rotating without deformation due to chucking, etc., the release agent is applied uniformly and thinly on the bladder surface, and the coating is applied. Can be formed.

[0011] After the release agent is applied, the claws of the hooks are bitten into the concave outer surface of the inner convex portion of the bladder which does not need to be applied and lifted, thereby deforming the bladder surface coated with the release agent. And can be easily taken out from the receiving part of the vertical stand.

Therefore, the bladder should be replaced immediately after the application without removing the release agent coating on the surface of the bladder during the removal, without waiting for the applied release agent to completely dry. To apply the next bladder.

Further, the bladder surface release agent application device according to the third aspect is suitable for applying a release agent to the surface of the annular bladder, and inserts the annular bladder into a horizontal roller to abut the clamp portion. The setting is completed only by holding the holding member, and the rotation of the annular bladder can be given from the horizontal roller by frictional transmission by utilizing the rigidity of the clamp portion.

Since the release agent is flammable and has a high curing speed , the release agent is blown on the surface of the bladder by a spray device while the bladder is rotated at a high speed by an explosion-proof air motor.
Put, the releasing agent is coated on the surface.

As a result, the amount of the release agent adhered per rotation is reduced, and the bladder is rotated and held without being deformed by chucking or the like. It can be applied to form the coating. Since the horizontal roller has a cantilever shape, the bladder on which coating has been completed can be easily taken out.

In the bladder surface release agent coating apparatus according to any one of claims 1 and 3, the rotation direction of the bladder is properly rotated forward and reverse to form a bladder vent line having directivity. The release agent can be applied thinly and uniformly to the groove bottom.

In addition, since a rotation speed suitable for applying the release agent can be selected for each bladder size, it can be applied to bladders of various sizes.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the drawings showing embodiments.

FIG. 1 shows a bladder surface release agent coating apparatus according to the present invention. The coating apparatus is a pot type rotating and holding a pot type bladder 1 used in an auto-form type (AFV) vulcanizing apparatus. A bladder rotation holding device 2, a spray device 5 for spraying and applying a release agent to an (outer) surface 4 of the bladder 1 by a spray nozzle 3 such as an air spray gun, and a conveying means 6 for the bladder 1 shown in FIG. And

Thus, as shown in FIG. 1, the pot-shaped bladder rotation holding device 2 has a bowl-shaped receiving portion 7 having an open upper end at the upper end and a rotatable vertical stand 8 rotatable around a vertical axis A. An air motor 9 for rotating the vertical stand 8 with variable rotation speed and rotation direction is provided. In the illustrated example, the vertical stand 8 and the air motor 9 are attached to a carriage 10.

The carriage 10 includes a carrier 13 formed by fixing a plate 12 on a frame 11 having a rectangular shape in a plan view, a handle portion 14 erected at a rear portion of the carrier 13, and front and rear portions attached to four corners at the bottom of the carrier 13. The vehicle has traveling wheels 15, 16 and a truck position fixing mechanism 17 attached to the rear side of the bottom of the loading platform 13. The truck position fixing mechanism 17 slightly lifts the rear traveling wheel 16 from the floor 18 or the like. The carriage 10 can be supported and can be fixed at a desired position.

The vertical stand 8 includes a receiving portion 7 having an outer flange portion 19 at an upper end, and a support rod 20 suspended from a bottom surface of the receiving portion 7.
And a shaft hole 21 and a radial screw hole 22 penetrating the shaft hole 21.
And a pivot shaft 23 having

The support rod 20 is inserted into the shaft hole 21 of the pivot shaft 23 so as to be slidable up and down, and is rotated by a threaded handle 24 screwed into the screw hole 22 so as to be able to advance and retreat. Support rod 20
, The height of the vertical stand 8 is adjusted.

The lower end of the pivot shaft 23 is rotatably pivotally connected to the carrier 13 through a pair of boss members 25 with bearings.

The air motor 9 is fixed to the carrier 13 at a predetermined interval from the vertical stand 8. This air motor 9
Rotating bodies 26 and 27 such as sprockets and timing pulleys are attached to the rotation output shaft of the shaft and the lower end of the pivot shaft 23, respectively. An endless transmission 28, such as a chain or a timing belt, is wound around to impart rotation to the motor 8.

Next, as shown in FIG. 2, the conveying means 6 of the bladder 1 is provided with a hook 29 for suspending the bladder 1.
And a pair of wire ropes 30, 30; and a pneumatic hoist 32 which is attached to the horizontal guide rail 31 so as to be able to run freely and drives the hook 33 to move up and down. The hook 29 is suspended via the 30, 30.

As shown in FIGS. 3 and 4, the hook 29 has a pair of left and right U-shaped support arms 35, each having a tip end pivotally connected around a horizontal axis B via a pivot 34. 35 and claw portions provided on both ends thereof through veneer pieces 36, 36, respectively.
37, and the right and left claw portions 37a and 37b are disposed so as to protrude outward in opposite directions to each other.

The support arm 35 in the illustrated example has a plurality of through holes 38.
An inverted U-shaped connecting member 39 on which the wire rope 30 is hung is detachably attached to the through hole 38 by bolt-nut coupling or the like.

The hook 29 shown in FIG.
Are shown in a straight line so that the projecting plate pieces 36, 36 can cross each other.

Next, a method of using the bladder surface release agent coating apparatus configured as described above will be described.

As shown in FIG. 1, a pot-shaped bladder 1 having an inner convex portion 40 protruding inward at the center portion is mounted on a vertical stand 8.
The inside convex part 40 is inserted and held in the receiving part 7 of FIG. As a result, the upper edge of the receiving portion 7 and the vicinity of the root of the inner convex portion 40 come into contact with each other, and the bladder 1 can rotate integrally with the vertical stand 8 due to frictional resistance.

Then, while the bladder 1 is driven to rotate in a predetermined direction by the air motor 9 via the vertical stand 8, the release agent is sprayed onto the predetermined portion of the surface 4 by the spray nozzle 3 to be applied. , Forming a film of a release agent.

This release agent has a rapid curing reaction, and if the release agent film is not formed thinly and uniformly, it is easily peeled off from the surface 4 of the bladder 1 in the vulcanizing step of the tire. When applying the release agent, the bladder 1 is rotated at a high speed to reduce the amount of the release agent adhered per rotation. Thereby, a thin uniform film can be formed on the surface 4 of the bladder 1.

As the release agent, for example, flammable white gasoline is used as the base solution. However, since the explosion-proof air motor 9 is used, it is necessary to ensure safety during the coating operation. Can be.

As shown in FIG. 8A, the bladder 1
, That the surface 4, has slanted and became large number of the vent line (groove) 63 ... with respect to the center axis L ₁ of the bladder 1.

For this reason, simply rotating the bladder 1 in only one direction cannot apply the release agent thinly and uniformly to the groove bottoms of the vent lines 63.

Therefore, the rotation direction of the bladder 1 is appropriately rotated forward and reverse by the air motor 9 having a variable rotation direction shown in FIG. 1 to form a thin and uniform film up to the groove bottom of the vent line 63. .

Further, since the rotation speed suitable for applying the release agent can be selected for each size of the bladder 1 by the air motor 9 having a variable rotation speed, the air motor 9 can be applied to bladders 1 of various sizes.

The bladder 1 coated as described above
Is taken out from the vertical stand 8 by the transport means 6 as shown in FIG.
It is transported to a drying table 42 having 41.

Specifically, the surface of the bladder 1 to which the release agent has been applied is easily deformed and cannot be gripped immediately after the application because it is not completely dried. Due to the structure of the device, the claws 37 of the hook 29 are closed (as shown in the lower part of the figure) into the recess forming the inner convex portion 40 which does not require the releasability (application of the release agent). Insert in the state.

Then, with the hoist 32, the wire rope 3
When the base ends of the support arms 35, 35 are pulled up via the pins 0, 30, the support arms 35, 35 are swung upward about the horizontal axis B, and the pawls 37 (as shown in the upper part of the figure) are moved. When opened, its tip bites into the concave outer surface 43 of the inner convex portion 40 of the bladder 1.

Further, when the support arms 35, 35 are lifted, the weight of the bladder 1 is added, and the claw portions 37 are inwardly protruded.
The bladder 1 can be reliably lifted up and taken out of the vertical stand 8 without being disengaged in the middle of ascending, since the bladder 1 is bitten deeper into the outer surface 43 of the 40.

After that, the bladder 1 taken out is horizontally moved to a drying table 42 by the hoist 32. Then, the bladder 1 is lowered and held on the drying table 42, and the hook 29 is removed from the bladder 1 by an operation reverse to the above.

FIGS. 5, 6 and 7 show another embodiment of the present invention. This coating apparatus is an annular bladder rotation holding apparatus for rotating and holding an annular bladder 44 used in a vagomatic type (BOM) vulcanizing apparatus. 45 and the circular bladder rotation holding
On the surface of the annular bladder 44 held by the device 45
Spraying device 5 for spraying release agent (similar to the embodiment of FIG. 1)
And

The annular bladder rotation holding device 45 includes a pair of horizontal rollers 46, 46 which are provided in a parallel cantilever shape and are rotatable about a horizontal axis C.
And an air motor 47 for rotating the 6, 46 in the same direction with variable rotation speed and rotation direction. In the illustrated example, the horizontal rollers 46, 46 and the air motor 47 are attached to a truck 48. .

The cart 48 includes a loading platform 49 having a rectangular shape in plan view, and a loading platform 49.
49, a pair of stays 50, 50 erected at the rear part, front and rear running wheels 51, 52 mounted at the four corners of the bottom of the loading platform 49, and attached to the rear of the bottom of the loading platform 49 (similar to the embodiment of FIG. ) And a truck position fixing mechanism 17).

A fixing plate 53 is fixed to the upper ends of the stays 50, 50.
Are protruded horizontally. And, at the front end of the beam member 54,
The support plate 55 is fixed orthogonally.

A pair of parallel horizontal rollers 46 are rotatably connected to the parallel support plate 55 and the fixed plate 53 via boss members 56 so as to be horizontal.

The horizontal roller 46 has an outer surface formed into a small uneven surface by knurling or the like, and a flange ring for preventing the bladder 44 from coming off is provided on both front and rear ends of the horizontal roller 46.
57, 57 are attached in an external fitting manner. This flange ring 57
Is preferably configured to be slidable in the axial direction of the horizontal roller 46 so that the position can be adjusted.

The air motor 47 is fixed to the fixed plate 53 with its rotary output shaft formed therethrough. Rotating bodies 58, 59, 59 such as sprockets and timing pulleys are attached to the rotation output shaft of the air motor 47 and the rear ends of the horizontal rollers 46, 46, respectively. 59
An endless transmission 60 such as a chain or a timing belt is wound around the horizontal roller 46 so as to rotate the horizontal rollers 46 from the air motor 47.

In this annular bladder rotation holding device 45, an annular bladder 44 having a U-shaped cross section having thick clamp portions 61, 61 at both open end edges is inserted into a pair of horizontal rollers 46, 46 to skewer. By holding in the form of a clamp, the clamps 61, 61
Is brought into contact with the outer surfaces of the horizontal rollers 46, 46.

Then, the air motor 47 is rotated to rotate the horizontal rollers 46, 46 to the bladder 44 by frictional transmission, while spraying a release agent onto the predetermined portion of the surface 62 with the spray nozzle 3. To form a film of a release agent.

Also in the case of this embodiment, the bladder 44 is rotated at a high speed to reduce the amount of the release agent adhering per rotation and to form a thin uniform film.

Further, as shown in FIG.
Has on its surface 62, since it has slanted and became large number of the vent line (groove) 64 ... with respect to the central axis L ₂ of the bladder 44 as appropriate forward and reverse the direction of rotation of the bladder 44 As a result, a thin and uniform film is formed up to the groove bottom of the vent lines 64. Further, a rotation speed suitable for releasing agent application is selected for each size of the bladders 44.

As described above, since the bladder 44 can be rotated by utilizing the rigidity of the thick clamp portion 61 without chucking, the bladder 44 is not deformed, and the surface 62 thereof is uniformly thin. A release agent can be applied. In addition, the bladder 44 can be reliably rotated without slipping due to the small uneven surface of the horizontal rollers 46, 46.

When the application of the release agent is completed, the horizontal roller 4
The bladder 44 can be easily pulled out from 6, 46 to the front and replaced with the next bladder 44 to be applied.

The present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the gist of the present invention. For example, in FIG. 1, the outer flange portion 19 of the receiving portion 7 may be omitted.

[0058]

[Effect of the Invention] The present invention is constructed as described above, and thus has the following remarkable effects.

Spraying a release agent on the surface 4 of the vase-shaped bladder 1 and the surface 62 of the annular bladder 44 with a spraying device;
This makes it possible to uniformly and thinly apply a release agent having a high curing rate to form a film. Since this film is thin and uniform, it does not easily peel off when used in the vulcanization process.

Since the air motor 9 and the air motor 47 are explosion-proof, it is safe to use a flammable release agent. In addition, the bladders 1 and 44 having directionality can be obtained by appropriately rotating the rotation directions of the bladders 1 and 44 forward and reverse.
Applicable to various sizes because the release agent can be applied thinly and uniformly to the groove bottom of the 44 vent lines, and the rotation speed suitable for applying the release agent can be selected for each size of the bladders 1 and 44 It is possible.

In the bladder surface release agent coating apparatus according to the first aspect, the receiving portion 7 of the vertical stand 8 is provided with the pot type bladder 1.
The bladder 1 can be configured to have a very simple structure that can be rotated and held by utilizing the shape of the inner convex portion 40. The bladder 1 can be set only by inserting the inner convex portion 40 into the receiving portion 7. Is extremely easy.

Further, since the bladder 1 is rotated and held without relying on chucking or the like, there is no deformation, and the bladder 1
The release agent can be applied uniformly and thinly on the surface 4 of the mold.

Then, if the hook 29 of claim 2 is used,
Without waiting for the applied release agent to completely dry, simply remove it from the receiving portion 7 of the vertical stand 8 and remove the bladder 1
Can be exchanged, and a release agent can be applied to the next bladder 1, and
At the time of removal, the coating of the release agent on the surface 4 of the bladder 1 is not damaged.

Further, in the bladder surface release agent applying device according to the third aspect, the horizontal rollers 46, 46 are cantilevered, and the rigidity of the thick clamp portions 61, 61 of the annular bladder 44 is increased. The bladder 44 can be very simply structured so that it can be rotated and held, and the bladder 44 can be inserted (set) and removed very easily.

Further, since the bladder 44 is rotatably held without relying on chucking or the like, there is no deformation, and the bladder 44 is not deformed.
The release agent can be uniformly and thinly applied on the surface 62 of the mold.

[Brief description of the drawings]

FIG. 1 is a side view showing a partial cross section of an embodiment of the present invention.

FIG. 2 is a simplified explanatory view of a main part of a transport means.

FIG. 3 is a front view of a hook.

FIG. 4 is a bottom view of the hook.

FIG. 5 is a side view showing another embodiment.

FIG. 6 is a plan view of a main part.

FIG. 7 is a sectional view taken along line XX of FIG. 6;

FIG. 8 is an explanatory diagram of a vent line.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bladder 2 Urn type bladder rotation holding device 6 Conveying means 7 Receiving part 8 Vertical stand 9 Air motor 29 Hook 35 Support arm 37 Claw portion 40 Inner projection 43 Outer surface 44 Bladder 45 Annular bladder rotation holding device 46 Horizontal roller 47 Air motor 61 Clamping section A Vertical axis B Horizontal axis C Horizontal axis

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI B29K 105: 24 B29L 30:00

Claims (3)

(57) [Scope of request for utility model registration] A vertical stand (8) having a bowl-shaped receiving portion (7) having an upper opening at its upper end and rotatable about a vertical axis (A).
A pot-type bladder 1 having an air motor 9 for rotating the vertical stand 8 with variable rotation speed and rotation direction, and having an inner convex portion 40 protruding inward at the center.
Is a pot-shaped bladder rotation holding device 2 that is inserted into the receiving portion 7 so as to be integrally rotatable with the inner projection 40 inserted therein.
And a vase-shaped bladder held by the vase-type bladder rotation holding device 2
Bladder surface release agent applying apparatus characterized by comprising a spray device 5 blowing a release agent to the surface of -1, the. 2. A pair of support arms 35, 35, whose tips are swingably connected around a horizontal axis B, respectively, and are provided at both ends, respectively, and the support arms 35 swing upward. Open the concave outer surface 4 of the inner convex portion 40 of the bladder 1
2. The bladder surface release agent applying apparatus according to claim 1, further comprising a conveying means provided with a claw portion for biting into the third member and a hook for holding the bladder. 3. A pair of horizontal rollers 46, 46 provided in a parallel cantilever shape and rotatable about a horizontal axis C.
And an air motor 47 for rotating the pair of horizontal rollers 46, 46 in the same direction while varying the rotation speed and the rotation direction.
1, 61 is an annular bladder 44 of U-shaped cross-section having, a pair of the horizontal roller 46, an annular bladder rotary holding device 45 which is held by the clamp portion 61 friction transmission capable abut, the An annular bra held by an annular bladder rotation holding device 45
Bladder surface release agent applying apparatus characterized by comprising on the surface of the loaders 44 and spray device 5 blowing a release agent.